20932869 has 4 divisors (see below), whose sum is σ = 27910496. Its totient is φ = 13955244.

The previous prime is 20932841. The next prime is 20932909. The reversal of 20932869 is 96823902.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20932869 - 2¹¹ = 20930821 is a prime.

It is a super-2 number, since 2×20932869² = 876370009142322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20932819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3488809 + ... + 3488814.

It is an arithmetic number, because the mean of its divisors is an integer number (6977624).

Almost surely, 2^20932869 is an apocalyptic number.

It is an amenable number.

20932869 is a deficient number, since it is larger than the sum of its proper divisors (6977627).

20932869 is an equidigital number, since it uses as much as digits as its factorization.

20932869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6977626.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 20932869 is about 4575.2452393287. The cubic root of 20932869 is about 275.5981207430.

The spelling of 20932869 in words is "twenty million, nine hundred thirty-two thousand, eight hundred sixty-nine".